[xp]vehicle speed and sound?

So I've got some larger sprites like motorbikes and mecha, and I'd like the walking mecha to move slow and for their frames to be a bit slower, but I'd like things like bikes or jets to move a bit quicker.

I'd also like to put in movement sound loops when they walk or move - engines for fast stuff and stomping crushing sounds with mecha.

What I'm really looking to have is some kind of switch that might indicate the current sprite needs to be activating different speeds or sound effects. Ideas would be warmly welcomed!